If `y = 2+sqrt(3)`, find the value of `y^2+1/y^2`

If x = 2 + sqrt(3) and y = 2 - sqrt(3) , find the value of x^(-2) + y^(-2) .

If x = 2 + sqrt(3) and y = 2 - sqrt(3) , find the value of x^(-3) + y^(-3) .

If x = 7 + 4 sqrt(3) , y = 7 - 4 sqrt(3) , find the value of (1)/(x^(2)) + (1)/(y^(2)) .

If x=2+sqrt(2) and y=2-sqrt(2) , then find the value of (x^(2)+y^(2)) .

If x=1+sqrt(2) and y=1-sqrt(2), find the value of (x^(2)+y^(2))

Find the value of y: y/4 - 1/2 = y/3

If y=(sqrt(3)+1)/(2) then find the value of 4y^(3)+2y^(2)-8y+10=

If a = (sqrt (2x + 3y) + sqrt (2x-3y)) / (sqrt (2x + 3y) -sqrt (2x-3y)) find the value of 3ya ^ (2) -4xa + 3y